Teraflex 1813000 Installation guide

Brand: Teraflex

Model: 1813000

Type: Installation guide

This manual is also suitable for

1849000

Teraflex 1813000 is a High Steer System Kit designed for the Dana 30 front axle, models 1992 and newer; and the 2003 + Rubicon front 44. This kit allows for a flat drag link, which can improve steering geometry and reduce bump steer. It also includes a drop pitman arm, which can help to correct steering angles after a lift has been installed. The kit is not all-inclusive, and may require additional modifications to the front sway bar links/mounting points and the front track bar mount.

Revised 23 Dec 05

1. Raise and support the front axle

so that the front tires are off of

the ground. Remove wheels.

2. Measure the tie rod from center

of mounting point to center of

mounting point on each knuckle.

Write this measurement down, you

will use this to help approximate

the new toe-in on reassembly.

3. Remove steering components from

the vehicle; tie rod and drag link.

Take every precaution to make this installation a safe procedure. Make safety

the number one priority with any suspension or lift installation. This kit was

designed for the Dana 30 front axle, models 1992 and newer; and the

2003 + Rubicon front 44.

NOTICE: This is NOT an all-inclusive kit. Prior to installation please have pre-

pared solutions to possible modications not included in the TeraFlex High Steer

System. These modications may include but are not limited to the front sway

bar links/mounting points and the front track bar mount. Included at the end of

these instructions are possible solutions to these issues.

NOTE: The High Steer Kit (HSK) was designed to work with a 1992 and newer

brake caliper mounting design so on older Dana 30 axles (84-91) it will be

necessary to update the caliper, the rotor and possibly the unibearing to the

later design. Factory offset wheels will not clear the HSK arm without using

wheel spacers. A better choice is aftermarket wheels with 3.5 inches or less of

backspacing.

HSK-LCG includes a drop pitman arm.

Installation Guide for the

High Steer System Kit

Part #001813000 (HSK)

Part #001849000 (HSK-LCG)

Tera Manufacturing, Inc.

5251 South Commerce Dr.

Murray, Utah 84107

Phone/801.288.2585

Fax/801.713.2313

www.teraex.biz

INSTALLATION GUIDE

Before Installing the Kit:

Revised 23 Dec 05

sway bar mount.

5. After 500 miles check all bolts

and re torque if necessary.

FRONT TRACKBAR MODIFICATIONS:

Using the HSK on a vehicle that still

runs a track bar brings up some issues

that must be resolved:

A drop pitman arm is no longer

needed. Moving the knuckle end of

the drag link up higher with the HSK

eliminates the need to drop down the

steering box end of the drag link. Us-

ing a drop pitman arm in this congu-

ration will result in bump steer (Refer

to gure 1).

The shape of the high steering arm

interferes with the factory sway bar

links and link mounts so a new way to

mount the sway bar links on the axles

was developed. These new Sway Bar

Mounts (TeraFlex part number TF990-

SBM L&R) require the use of shorter

sway bar links.

In some cases it might also be neces-

sary to relocate the axle end of the

track bar to minimize the side-to-side

movement of the axle during suspen-

sion cycling.

Guideline 1: If a track bar is used in

the front suspension, the track bar

and drag link must be parallel (Refer

to gure 2).

Guideline 2: With leaf springs or

a triangulated 3 or 4 link front

suspension the tie rod and drag link

must be parallel (Refer to gure 3)

12. Check all bolts and nuts for proper

torque specications, and use

cotter pins where required.

13. Reinstall wheels and lower vehicle

to the ground.

14. After installation of the TeraFlex

High Steer System, the front end

alignment angles must be checked.

Take your Jeep to an alignment

shop that understands 4WD

vehicles and has experience with

their alignment parameters.

NOTE: DO NOT drive the vehicle

until the alignment has been

performed!!

15. After 500 miles check all bolts

and jam nuts, and re torque if

necessary.

Note: Additional Modications that

will be necessary are listed and

detailed next, but are not included

in the HSKT or HSKY.

FRONT SWAY BAR MODIFICATIONS:

The sway bar mounts on the axle

will have to be relocated to clear

the height increase of the drag link.

TeraFlex has developed sway bar

brackets that can accomplish this

modication. (SBM-L, SBM-R). When

the sway bar bracket is relocated a

shorter sway bar link (QD132-4) must

be used.

1. Cut off the stock sway bar mount

at the point where it attaches to

the spring pad bracket.

2. Grind the area smooth to avoid

cutting yourself on the sharp edge,

and paint to prevent rusting.

3. Place the new sway bar mount on

the inner knuckle so that it is

vertical (see last photo), and tack

weld it in place. Double check to

make sure that the mount is in the

right location and then nal weld.

4. Secure the sway bar links to the

PASSENGER SIDE DISASSEMBLY:

Note: For additional detail on these

procedures, refer to the factory Jeep

Service Manual.

4. Remove the 2 brake caliper bolts,

then the caliper and brake rotor.

5. Remove the 3 wheel bearing

bolts, and pull the unibearing/axle

shaft assembly from the vehicle.

Note: If the axle housing starts to

leak, stuff a rag inside the tube to

prevent axle uid from leaking.

6. Remove the top and bottom

ball joint nuts on the knuckle,

and remove the knuckle from the

vehicle.

REASSEMBLY:

7. Reinstall the new TeraFlex High

Steer Knuckle. Torque ball joint

nuts as specied in the Jeep

Service Manual.

8. Install the hub assembly, axle

shaft, and rotor.

9. Install caliper and brake pads.

10. Install the new tie rod and set the

length to the measurement taken

in step 2 above.

11. Install the drag link from knuckle

to pitman arm. Refer to the

attached drawing and be sure to

use a 9/16 at washer under the

castle nut.

Revised 23 Dec 05

High Steer Knuckle

Track Bar Modifications

FIGURE 2.

FIGURE 1.

FIGURE 3.

Revised 23 Dec 05

990 Knuckle update 18 April 2005

The 990 High Steer Knuckle from TeraFlex is going through some changes. The original purpose of this

knuckle was to allow a at drag link when installing a TeraFlex LCG suspension system. Since we introduced

the knuckle many of you have found additional applications for this TeraFlex product. The original design

(gure 1) included a much longer steering arm, raised above the stock location. The length of the arm was

intended to allow use of stock locations for the sway bar links. The longer steering arm required the use of a

much longer pitman arm to allow full lock-to-lock steering.

Figure 1

What we found out is virtually all installations require

some modication of the sway bar mounting point,

particularly if a 975 S/T sway bar is installed. In the

latest production run of the 990 knuckle, which will

be shipping starting the rst of April, the steering arm

length has been reduced to allow use of a stock length

pitman arm. When installing the LCG system a regular

TJ drop pitman arm will give the correct drag link angle

(parallel to the tie rod) and when using the High Steer

990 knuckle in tall lifted vehicles a stock pitman arm

will be used (drag link parallel to the track bar).

The new 990 knuckle (gure 2) will ship without a

pitman arm. It will include the tapered split sleeves as

in the past to allow placing the drag link end either

in from the top or in from the bottom of the steering

arm, depending on the application. When buying a 990

knuckle be sure to have the correct pitman arm on hand

for your application. TeraFlex will be happy to sell you a

drop pitman arm if needed, and we have a limited supply

of factory pitman arms that we can sell. Remember that a

pitman arm will no longer be automatically supplied with

the knuckle only. Some suspension systems may include a

pitman arm as they have in the past.

HSK-LCG includes a drop pitman arm.

Figure 2

Teraflex 1813000 Installation guide

Brand: Teraflex

Model: 1813000

Type: Installation guide

This manual is also suitable for

1849000

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Teraflex 1813000 Installation guide

This manual is also suitable for

Teraflex 1813000 Installation guide

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